An Investigation of the Relationship Between Raw Coal Caking Characteristics and Its Petrographic Properties

In industry, the coking characteristics of coal are mainly based on investigating the traditional coal chemical indicators, and the coal petrology theory can better reflect the intrinsic properties of coal, so it is necessary to explore these two aspects. The relationship between the caking parameters and maceral properties of coal was obtained by testing and analysis. The results show that the formation of colloids in coal is mainly related to the vitrinite composition and the Audibert-Arnu dilatation and caking index are closely related to the average maximum vitrinite reflectance. According to the softening temperature, the caking property of blending coal can be improved under the condition of ensuring the formation of colloids without temperature fault during the process. Since the parameters of macerals have an obvious effect on caking characteristics, it is of great significance to introduce the related indexes of macerals into the auxiliary production.